# SDR UALA2011062103050

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 17, 2011
- Submitted: June 29, 2011
- Operation: Air carrier
- Aircraft: N173UA
- Make and model: Boeing 747422
- Aircraft serial: 24380
- Aircraft time: 83,085 hours, 9,425 cycles
- Engine: Pwa PW4056
- System (JASC): [3245 · Tire Tube](https://openairdocs.org/jasc/3245)
- Part: Tire
- Condition: Worn
- Location: Rt Mlg
- Stage of operation: TX
- How discovered: O
- Nature of condition: E
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2011062103050

## Discrepancy

GEAR VIBRATION AT 75 KTS UNTIL ABOUT 100KTS ON TAKEOFF.  SEEMS TO BE BODY OR WING NOT NOSE.  FLT CREW FELT IT AND LASTED AROUND 5 SECONDS EA TIME.  GOT VIB AGAIN ON LANDING PER CREW.  REPLACED NR 15 & 16 MLG TIRES ON R WING GEAR FOR UNEVEN WEAR.

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